2 layers159.5 × 30 mm
Type f
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
25 parts3kApache-2.0
2 layers20 × 16 mm
Usb uart bridge pcb
circuitscript/usb-uart-bridge- Size
- 20 × 16 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 30
- Pads
- 94
- Tracks, vias
- 174, 66
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 16 May 2026
- Updated
- 16 May 2026
Overview
Usb uart bridge pcb is an open-source printed circuit board by circuitscript, from the circuitscript/usb-uart-bridge repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 20 × 16 mm with 25 parts on 30 nets, routed with 174 tracks and 66 vias.
Its parts include 9 resistors, 6 capacitors, 5 diodes, 3 connectors and 2 ICs. It belongs with the interfaces and adapters boards of this library.
README
README.mdCompact CH340 USB-C USB-UART bridge
This repository contains the files for a compact USB-C to UART bridge using the CH340 chip. The main purpose is to create a compact dev board that can be used for UART communications.
Project files
- Schematics - designed with circuitscript
- PCB layout - designed with KiCad
Production
The initial production was done with JLCPCB and parts are completely sourced from LCSC.
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 5.1k | Resistor_SMD:R_0402_1005Metric | R3, R4, R5, R6, R7, R8, R9 |
| 4 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4 |
| 3 | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D3, D4, D5 | |
| 2 | Diode_SMD:D_SOD-523 | D1, D2 | |
| 2 | 0 | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric | C5, C6 |
| 1 | Package_SON:WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm_ThermalVias | U2 | |
| 1 | Package_SO:MSOP-10_3x3mm_P0.5mm | U1 | |
| 1 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Horizontal | J2 | |
| 1 | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J3 | |
| 1 | Connector_USB:USB_C_Receptacle_Molex_105450-0101 | J1 |
Questions
How big is the Usb uart bridge pcb PCB?
It measures 20 × 16 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Usb uart bridge pcb use?
25 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Usb uart bridge pcb KiCad files?
From the circuitscript/usb-uart-bridge repository on GitHub, at the commit this page was made from: the board is usb_uart_bridge_pcb/usb_uart_bridge_pcb.kicad_pcb and its schematic usb_uart_bridge_pcb/usb_uart_bridge_pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Usb uart bridge pcb design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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